Drill or bit chuck.



No. 664,127. Patented Dec. l3, I900,

J. J. CRIPPEN.

DRILL OR BIT CHUCK.

pplication filed Aug. 21, 1900.)

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NITED STATES PATENT OFFICE.

JOSEPH J. ORIPPEN, OF DENVER, COLORADO.

DRILL OR BIT CHUCK.

SPECIFICATION forming part of Letters Patent No. 664,127, dated December18, 1900.

Application filed A ust 21, 1900. Serial No. 27.596. (N0 model.)

To all whom it may concern:

Be it known that I, JOSEPH J. ORIPPEN, a citizen of the United States,residing at Denver, in the county of Arapahoe and State of Colorado,have invented certain new and useful Improvements in Drill or BitOhucks; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to improvements in drill or bit chucks, and has forits object the production of a chuck having a simple and efficientconstruction and arrangement of parts whereby the jaws may be easily andspeedily adjusted, combined with jaws of peculiar construction adaptedto firmly and securely lock the drill or bit against longitudinal oraxial movement and to receive drills or bits of different forms.

With this and other minor objects in view the invention consists ofcertain novel features of construction, combination, and arrangement ofparts, as will be hereinafter more fully described, and particularlypointed out in the appended claims.

In the accompanying drawings, Figure 1 is a longitudinal section of abit or drill chuck embodying my invention. Fig. 2 is a transversesection on the line 2 2 of Fig. 1. Fig. 3 is a similar View on line 3 3of Fig. 1. Fig. 4 is a top plan view of the bushing. Fig. 5 is a sideelevation of the jaws detached and arranged as in use, and Fig. 6 is aperspective view of one of the jaws.

Referring now more particularly to the drawings, wherein like referencecharacters designate corresponding parts throughout the several views,the numeral 1 represents the head or socket of the chuck, into which isscrewed the stock, spindle, or standard carrying the chuck or theforward end of the ram when a rock-drill is employed. This socket isreduced to form an annular shoulder 2, which seats upon the outer end ofan annular flange or collar 3, formed upon a bushing 4., and a tubularstem 5, which is screwed into said flange and rests upon the outer endof the bushing. The bushing in turn is threaded into the outercylindrical chamber 6 of an adjusting sleeve 0r. nut 7 and rests againsta shoulder 8, formed at the base of said chamber. In the body of thebushing are formed vertical grooves or slots 9, terminating in recesses9 which are adapted to receive locking-lu gs on the jaws, as hereinafterdescribed. Below the shoulder 8 the sleeve 7 tapers interiorly to form aflaring chamber 10, which receives the clutch-jaws 11, which areexteriorly curved and taper longitudinally and when assembled form aclutch device of exterior frusto-conical form. The inner broad ends ofthe jaws bear against the lower end of the bushing and are provided withshanks 12, on which are formed lugs 13,which fit within the recesses9,and vertical guide-flanges 14, which fit within the slots 9,by whichmeans the jaws are held in position and prevented from having any but aradial movement toward and from each other and toward and from the axisof the chuck, so as to be adjusted to clamp bits and drills of differentsizes. The jaws are of peculiar formation, each in addition to beingtapered having a spiral twist of any desired degreeone-third, one-half,two-thirds, or a great-er or less degree, as may be found most efficientor desirable. They are also provided with clam ping-faces 15, disposedlongitudinally and axially on their inner sides, and these faces conformto the general shape of the jaws, having a spiral twist or curvature. Bythis construction the gripping action of the jaws is materiallyenhanced, as the spiral twist imparted thereto prevents any longitudinalslipping or axial play of the bit or drill held between them in a mannerreadily understood. When the jaws are assembled in the chuck for use,the clamping faces 15, while spirally disposed on the jaws, extendlongitudinally in the axial line of the chuck, so as to bear throughouttheir entire length against the surface of the bit or drill,whereby afirm and secure clamping action is insured. The construction is alsosuch that bits and drills of different forms in cross-section may bereceived and rigidly clamped.

The number of jaws employed may be varied according to the size of thechuck and the taste or fancy of the user, and other changes in theconstruction may be made without departing from the spirit orsacrificing any of the advantages of the invention.

ing recesses, jaws provided with guide-flanges and locking-lugs to entersaid grooves and recesses, and formed with tapering outer sides, andwith a shoulder to engage the lower end of said bushing, and an adjListing-sleeve having a tapered base and a screw-threaded connectionwith the bushing, substantially as set forth.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOSEPH J. ORIPPEN. Witnesses:

JOHN C. FELDWISOH, W. P. CAMPBELL.

